Identification_Information:
Citation:
Citation_Information:
Originator: Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
Publication_Date: 200512
Title: CRED Optical Validation Data at Eleven-Mile Bank in the U.S. Territory of Guam, 2003, to Support Benthic Habitat Mapping
Geospatial_Data_Presentation_Form: Video imagery, track line navigation files, and log sheets
Online_Linkage: http://www.soest.hawaii.edu/pibhmc/
Description:
Abstract: Optical validation data were collected using a Tethered Optical Assessment Device (TOAD), an underwater sled
equipped with an underwater digital video camera and lights. Data were collected in the U.S. territory of Guam, around
the island of Guam itself and 3 banks within the territory, to support Benthic Habitat Mapping efforts during NOAA
Ship Oscar Elton Sette cruise OES0308, from September 22-28, 2003.
Purpose: These data provide optical observations that will be correlated with bathymetry and acoustic backscatter
imagery to develop a benthic habitat map of Eleven-Mile Bank. Refer to supplemental information for description of instrument
and survey.
Supplemental_Information: Eleven-Mile Bank is part of the U.S. territory of Guam and located about 9 nautical miles (17 km) south of the
southern end of the island of Guam. The surface of this predominantly cone-shaped bank is characterized by rough
terrain, at least at depths shallower than 100 m. As implied by its name, the charted depth of the peak of the bank
is 11 fathoms (20 m). This bank has some coral and, despite its proximity to the island of Guam, many reef fish.
Optical validation data were collected using the Tethered Optical Assessment Device (TOAD), a sled equipped with
underwater video camera and lights. These data are used to provide ground-truth validation for benthic habitat maps
based on multibeam echosounder surveys. Camera sled deployments were conducted at night, usually between 1800 and
midnight. The duration of each tow varied but averaged about 40 minutes of bottom time at a given location. The camera
sled was deployed from the port J-frame mounted amidships on the NOAA Ship Oscar Elton Sette. At each station the
ship was positioned with the wind on the port side and drifted downwind; occasional light turns were applied to the
ship's screws if necessary to reduce the ship's motion. The TOAD was lowered slowly to the bottom by the deck crew
using a capstan. The operator monitored a live video feed from the camera and began recording data on a video tape
recorder. When the camera reached bottom the deck crew was notified by radio to stop lowering. The operator
continued to monitor the vehicle and provided commands to raise or lower it to keep the camera just above the bottom.
Equipment Description: The TOAD was deployed from the lower arm of the vessel's port side J-frame. The TOAD is a
camera sled based on the Guildline MiniBat model 8820 tow body. The frame has been extensively modified from its
original configuration and was equipped with an ROS model 54-00100-13 color underwater video camera as the primary
data collection instrument. The ROS camera was mounted to point at approximately a 45 degree angle toward the seafloor.
A Deep Sea Power and Light model 2050 MultiSeaCam low-light color video camera was also mounted on the sled and aimed
straight ahead. The signal from this camera was fed to a second video monitor to provide warning of underwater obstructions
the sled might be headed for. Illumination was provided by two 500 W DeepSea Power & Light Multi-SeaLite model 1050
underwater lights mounted on the original sled frame. The lights were located near the base and each side of the sled
to provide the maximum possible horizontal distance from the ROS camera. Cable between the sled and the surface
consisted of a underwater electrical cable (cable 2, black in color) with an internal kevlar strength member to
support the sled frame. The cable was led from the camera sled over a 22-inch diameter sheave hung from the J-frame,
and from there around a gypsy head mounted on the alternate CTD winch, amidships on the vessel's port side. All TOAD
surface components were located in the Dry Lab in an equipment rack on the after bulkhead.
Name & address of person collecting data:
John Rooney
NOAA IRC
NMFS/PIFSC/CRED
1845 WASP Blvd., Building 176
Honolulu, HI 96818
Data Files: Video data were recorded on a video tape recorder. The position of the camera sled was recorded in WGS-84
using Guildline MiniBat In-Tow data acquisition software and a data feed from a shipboard Northstar Chartplotter.
File naming convention: Each tow is given a name consisting of a 3-letter designator for the island area followed by
a two-digit year and three-digit tow number, which increments by one for each new tow around that island. For Eleven-Mile Bank the designator is
"ELE."During OES0308 (NOAA Ship Oscar Elton Sette's 8th cruise in calendar year 2003) the consecutive numbers started
at ELE03000. Video tape labels, the navigation files (*.glo) and paper log forms are annotated with the tow name and number,
e.g., ELE03001. If the navigation file is edited during processing the file name has a suffix 'a' added. For example,
for a navigation data file named "ELE03001a.glo," the 'a' would indicate that metadata were extracted from the navigation
data and recorded to a file with the same name as the navigation file except that a file type of '.met' was appended;
for example, 'ELE03001a.glo.met.
Time Correlation: All times are based on UTC. Two clocks were manually synchronized prior to starting data collection;
the clock in the video character generator that was used to annotate the video tape, and the clock in the TOAD data
acquisition computer. These clocks were set to UTC at the beginning of each evening's operations.
Resource Description: Digital video imagery that is geo-referenced to navigation files.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20030924
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: 144.44
East_Bounding_Coordinate: 145.46
North_Bounding_Coordinate: 13.24
South_Bounding_Coordinate: 13.22
Keywords:
Theme:
Theme_Keyword_Thesaurus: CoRIS Theme Thesaurus
Theme_Keyword: EARTH SCIENCE > Biosphere > Aquatic Habitat > Benthic Habitat
Theme_Keyword: EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Mapping
Theme_Keyword: EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Photographic Analysis > Videography
Theme:
Theme_Keyword_Thesaurus: CoRIS Discovery Thesaurus
Theme_Keyword: Visual Images > Habitats
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Tethered Optical Assessment Device (TOAD)
Theme_Keyword: Underwater video
Theme_Keyword: OES0308
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: environment
Theme_Keyword: biota
Place:
Place_Keyword_Thesaurus: CoRIS Place Thesaurus
Place_Keyword: OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Guam > Guam (13N144E0000)
Place_Keyword: COUNTRY/TERRITORY > United States of America > Guam > Guam (13N144E0000)
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Eleven-Mile Bank
Place_Keyword: U.S. Territory of Guam
Place:
Place_Keyword_Thesaurus: CoRIS Region
Place_Keyword: Guam
Access_Constraints: None
Use_Constraints: Please acknowledge the NOAA Coral Reef Ecosystem Division, Pacific Islands Fisheries Science Center as the source of this information.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
Contact_Person: John Rooney
Contact_Address:
Address_Type: mailing and physical address
Address: NOAA IRC
Address: NMFS/PIFSC/CRED
Address: 1845 WASP Blvd., Building 176
City: Honolulu
State_or_Province: HI
Postal_Code: 96818
Contact_Voice_Telephone: 808 725-5360
Contact_Facsimile_Telephone: 808 725-5429
Contact_Electronic_Mail_Address: nmfs.pic.credinfo@noaa.gov
Contact_Instructions: e-mail preferred
Data_Set_Credit: Pacific Islands Benthic Habitat Mapping Center, Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), NOAA
Security_Information:
Security_Classification_System: Not applicable
Security_Classification: Unclassified
Security_Handling_Description: Not applicable
Data_Quality_Information:
Logical_Consistency_Report: Unspecified
Completeness_Report: Complete
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report: The horizontal position accuracy for the camera sled position is estimated
at plus or minus 100 meters. There are three primary sources of this error. The ship's positioning is based on
GPS SPS, often called standalone or non-differential GPS positioning. SPS has a measured accuracy of under 5 meters.
The position of the GPS antenna is used; no attempt is made to translocate this position to that of the tow block
from which the camera is deployed. The difference between the tow block and the antenna is about 14 meters. The largest
source of error is uncertainty associated with the sled's position relative to the tow block.
Lineage:
Process_Step:
Process_Description: After a tow was completed the video tape data and still photograpshs were reviewed by spot-checking to verify that
data were recorded. Navigation data were copied from the acquisition computer to the data archive. A metadata
extractor (gloMeta.py, version 9/28/04) was run to summarize the navigation data and test for errors. If errors
were detected they were corrected or flagged as appropriate and a new data file was made. This file's header was
updated to document what type of processing occurred. A metadata file was recorded in the data archive in the same
location as the navigation data. Processed navigation data were then read into ArcView 3.2 shapefiles using an Avenue
script named `toadimport.playback.ave', version 9/25/01, written by Ronald Hoeke.
Process_Date: 20051017
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
Contact_Person: John Rooney
Contact_Address:
Address_Type: mailing and physical address
Address: NOAA IRC
Address: NMFS/PIFSC/CRED
Address: 1845 WASP Blvd., Building 176
City: Honolulu
State_or_Province: HI
Postal_Code: 96818
Contact_Voice_Telephone: 808 725-5360
Contact_Facsimile_Telephone: 808 725-5429
Contact_Electronic_Mail_Address: nmfs.pic.credinfo@noaa.gov
Contact_Instructions: e-mail preferred
Resource_Description: Offline Data
Distribution_Liability: These data are not to be used for navigational purposes. NOAA makes no warranty regarding these
data, expressed or implied, nor does the fact of distribution constitute such a warranty. NOAA cannot assume liability
for any damages caused by any errors or omissions in these data, nor as a result of the failure of these data to function
on a particular system.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ASCII
Format_Information_Content: Navigation information are recorded as successive lines in a comma-delimited ASCII text file, with a .glo extension. Each line of a GLO file includes the
following data: the year, day of year, time, latitude, longitude, water column depth, vehicle depth, layback, and wing angle. The field for wing angle does not contain useful data.
A total of 3 navigation files were collected, including:
ele03000a.glo
ele03001.glo
ele03002.glo
Digital_Transfer_Option:
Offline_Option:
Offline_Media: CD-ROM
Recording_Format: ISO 9660
Digital_Form:
Digital_Transfer_Information:
Format_Name: mini digital video cassette
Format_Information_Content: These data were recorded on 2 video tapes, include 1 hour and 19 min of
video data covering 2.1 linear km of seabed.
List of video tapes:
ELE03000-001, Mini DV, Master
ELE03002, Mini DV, Master
ELE03000-001, Mini DV, Backup
ELE03002, Mini DV, Backup
Digital_Transfer_Option:
Offline_Option:
Offline_Media: Video cassette tape
Recording_Format: mini DV
Fees: None
Metadata_Reference_Information:
Metadata_Date: 20140312
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
Contact_Person: CRED Data Management Team
Contact_Address:
Address_Type: mailing and physical address
Address: NOAA IRC
Address: NMFS/PIFSC/CRED
Address: 1845 WASP Blvd., Building 176
City: Honolulu
State_or_Province: HI
Postal_Code: 96818
Contact_Voice_Telephone: 808 725-5360
Contact_Facsimile_Telephone: 808 725-5429
Contact_Electronic_Mail_Address: nmfs.pic.credinfo@noaa.gov
Contact_Instructions: e-mail preferred
Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
CoRIS:
CoRIS_ID: 20080502061635
CoRIS_Children: None
CoRIS_Beginning_Date: 20030924
CoRIS_Ending_Date: 20030924
CoRIS_Metadata_Link: http://www.coris.noaa.gov/metadata/records/html/cred_toad_eleven_mile_bank_guam_oes0308_2003.html
CoRIS_Tracking_ID: 1338